op-program: Allow new named chains to be added without the op-geth config

feat: Introduce a new op-challenger service for PoPs

Simplifies the bedrock migration and the new mainnet config can be added afterwards.

ops-bedrock: Remove unused OFFLINE_GAS_ESTIMATOR envar

op-program: Re-add caching wrapper to oracles.

op-e2e: Fix flaky TestVerifyL2OutputRootEmptyBlock

Increase cache size for l2 blocks.

fix: Markdown base link

Update differential testing script to geth 1.11.6

op-chain-ops: check-migration-quick

Adds a new tool that can be used as part of the migration that checks
a minimal amount of information to ensure that the database migration
was successful. It checks the extradata in the block header for the
bedrock magic and errors if its not found. It will log information
about the block header as well.

op-e2e: Add FPP test for empty blocks

Asserting that the FPP will generate empty blocks when there are missing
batches

op-geth: Update for 1.11.6 changes

Update docker files to use golang:1.19.9 and alpine3.16

fix(spec): Update `IAttestationDisputeGame` spec

op-program: Ensure go routines all complete cleanly

feat(ctb): Use named vars for reused config addresses

maint: update README to fix Optimism wording

Updates the README to better conform to the language we've been using. Optimism is not a blockchain, but OP Mainnet is.